From patchwork Mon Aug 22 02:33:27 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Huang, Shaoqin" X-Patchwork-Id: 12950143 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id B5012C00140 for ; Mon, 22 Aug 2022 02:37:59 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id 4EE8D6B0073; Sun, 21 Aug 2022 22:37:59 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 49CE2940009; Sun, 21 Aug 2022 22:37:59 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 33DE0940008; Sun, 21 Aug 2022 22:37:59 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0013.hostedemail.com [216.40.44.13]) by kanga.kvack.org (Postfix) with ESMTP id 24EA86B0073 for ; Sun, 21 Aug 2022 22:37:59 -0400 (EDT) Received: from smtpin26.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay10.hostedemail.com (Postfix) with ESMTP id 0007FC0764 for ; Mon, 22 Aug 2022 02:37:58 +0000 (UTC) X-FDA: 79825668636.26.CD401A9 Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by imf23.hostedemail.com (Postfix) with ESMTP id E0D79140050 for ; Mon, 22 Aug 2022 02:34:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1661135659; x=1692671659; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=QVIKac2TXXwtCKl68qr2q3XupTvP7bG4gHMbUWl00rA=; b=ZND58+hrl2StoKXbGclPXNsKhKW3m8m659el84jbY0s1/KMCTSruXZ+g sR321qlJ4E+Me5x9h/Bm3Lnu+tM4vCtxPmmw5vFX4xj2XOA9GywucBySq EfWVZCgkBP4itinfAdxM0IT9/f1n236+YVH4zwFVAniJV2pVPrHivgOmi 0U4PV0C1izRbfdkViIyQbY6Oz05Y+JK7E8MsPL2PSdxPFMk44s9dFyE0w XS8pGr2upkA8bTjn0zijD9cebsuCDd36R38F/pGzDSKsV6yaNi7p30qJM 0Dia/4e9BTkVbQoyqVnqKUqvebxswvzlA5l472sMW4gu/+SxOYseEY34f g==; X-IronPort-AV: E=McAfee;i="6500,9779,10446"; a="280274682" X-IronPort-AV: E=Sophos;i="5.93,254,1654585200"; d="scan'208";a="280274682" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Aug 2022 19:34:18 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.93,254,1654585200"; d="scan'208";a="936851013" Received: from q.bj.intel.com ([10.238.154.102]) by fmsmga005.fm.intel.com with ESMTP; 21 Aug 2022 19:34:16 -0700 From: shaoqin.huang@intel.com To: rppt@kernel.org Cc: Shaoqin Huang , Karolina Drobnik , Rebecca Mckeever , David Hildenbrand , linux-mm@kvack.org, linux-kernel@vger.kernel.org Subject: [PATCH 2/3] memblock test: Add test to memblock_reserve() 129th region Date: Mon, 22 Aug 2022 10:33:27 +0800 Message-Id: <20220822023332.127633-3-shaoqin.huang@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220822023332.127633-1-shaoqin.huang@intel.com> References: <20220822023332.127633-1-shaoqin.huang@intel.com> MIME-Version: 1.0 ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1661135660; a=rsa-sha256; cv=none; b=xZZNwP2JrSIVs1MdfXHYZcuL+DvH//p7HwBI7sEMTew+O7vAYXgAu6hU+dWN7P4QLby5o+ e3tz3eptCp0MGDVhdyr6/hKEJq/EEoSYYnhmJMbwIKbsgZcAnW+goyxRiO41gRYFKztpCh 2M1c5J5e6EiwVw12oPqDjB5QJFhtzis= ARC-Authentication-Results: i=1; imf23.hostedemail.com; dkim=none ("invalid DKIM record") header.d=intel.com header.s=Intel header.b=ZND58+hr; dmarc=pass (policy=none) header.from=intel.com; spf=pass (imf23.hostedemail.com: domain of shaoqin.huang@intel.com designates 134.134.136.20 as permitted sender) smtp.mailfrom=shaoqin.huang@intel.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1661135660; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=5Zb9ZmQRaeUHvNWIPnwBfcKvFWkG8hWFUQnwJTNy3kE=; b=cvmitptTazetK51g82IphSZf3IbN0jKLRmBAcqPB/z3e6wM30ND+ls2AxB4ugQN3MOFzqD sVdGU9sRorsFinB9nmaYl9EkI7HZmob8Qv3l/oJAHYyauP+1esA+n+1Xxm8wJDllBsxKBR TbKsTiNBkEAwLrf4CeaCSgz/M7yfV/c= Authentication-Results: imf23.hostedemail.com; dkim=none ("invalid DKIM record") header.d=intel.com header.s=Intel header.b=ZND58+hr; dmarc=pass (policy=none) header.from=intel.com; spf=pass (imf23.hostedemail.com: domain of shaoqin.huang@intel.com designates 134.134.136.20 as permitted sender) smtp.mailfrom=shaoqin.huang@intel.com X-Rspam-User: X-Stat-Signature: rzcjutunf8xtw4p96bbqoee7e4tm657b X-Rspamd-Queue-Id: E0D79140050 X-Rspamd-Server: rspam06 X-HE-Tag: 1661135659-792220 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Shaoqin Huang Reserve 129th region in the memblock, and this will trigger the memblock_double_array() function, this needs valid memory regions. So using dummy_physical_memory_init() to allocate a valid memory region. At the same time, reserve 128 faked memory region, and make sure these reserved region not intersect with the valid memory region. So memblock_double_array() will choose the valid memory region, and it will success. Also need to restore the reserved.regions after memblock_double_array(), to make sure the subsequent tests can run as normal. Signed-off-by: Shaoqin Huang --- tools/testing/memblock/tests/basic_api.c | 87 ++++++++++++++++++++++++ 1 file changed, 87 insertions(+) diff --git a/tools/testing/memblock/tests/basic_api.c b/tools/testing/memblock/tests/basic_api.c index c8e201156cdc..d8defc9866cb 100644 --- a/tools/testing/memblock/tests/basic_api.c +++ b/tools/testing/memblock/tests/basic_api.c @@ -686,6 +686,92 @@ static int memblock_reserve_twice_check(void) return 0; } +/* + * A test that tries to reserve the 129th memory block. + * Expect to trigger memblock_double_array() to double the + * memblock.memory.max, find a new valid memory as + * reserved.regions. + */ +static int memblock_reserve_many_check(void) +{ + int i; + void *orig_region; + struct region r = { + .base = SZ_16K, + .size = MEM_SIZE, + }; + phys_addr_t memory_base = SZ_128K; + phys_addr_t new_reserved_regions_size; + + PREFIX_PUSH(); + + reset_memblock_regions(); + memblock_allow_resize(); + + /* Add a valid memory region used by double_array(). */ + dummy_physical_memory_init(); + memblock_add((phys_addr_t)get_memory_block_base(), MEM_SIZE); + + for (i = 0; i < INIT_MEMBLOCK_REGIONS; i++) { + /* Reserve some fakes memory region to fulfill the memblock. */ + memblock_reserve(memory_base, MEM_SIZE); + + ASSERT_EQ(memblock.reserved.cnt, i + 1); + ASSERT_EQ(memblock.reserved.total_size, (i + 1) * MEM_SIZE); + + /* Keep the gap so these memory region will not be merged. */ + memory_base += MEM_SIZE * 2; + } + + orig_region = memblock.reserved.regions; + + /* This reserve the 129 memory_region, and makes it double array. */ + memblock_reserve(memory_base, MEM_SIZE); + + /* + * This is the memory region size used by the doubled reserved.regions, + * and it has been reserved due to it has been used. The size is used to + * calculate the total_size that the memblock.reserved have now. + */ + new_reserved_regions_size = PAGE_ALIGN((INIT_MEMBLOCK_REGIONS * 2) * + sizeof(struct memblock_region)); + /* + * The double_array() will find a free memory region as the new + * reserved.regions, and the used memory region will be reserved, so + * there will be one more region exist in the reserved memblock. And the + * one more reserved region's size is new_reserved_regions_size. + */ + ASSERT_EQ(memblock.reserved.cnt, INIT_MEMBLOCK_REGIONS + 1 + 1); + ASSERT_EQ(memblock.reserved.total_size, (INIT_MEMBLOCK_REGIONS + 1) * MEM_SIZE + + new_reserved_regions_size); + ASSERT_EQ(memblock.reserved.max, INIT_MEMBLOCK_REGIONS * 2); + + /* The base is very small, so it should be insert to the first region. */ + memblock_reserve(r.base, r.size); + ASSERT_EQ(memblock.reserved.regions[0].base, r.base); + ASSERT_EQ(memblock.reserved.regions[0].size, r.size); + + ASSERT_EQ(memblock.reserved.cnt, INIT_MEMBLOCK_REGIONS + 2 + 1); + ASSERT_EQ(memblock.reserved.total_size, (INIT_MEMBLOCK_REGIONS + 2) * MEM_SIZE + + new_reserved_regions_size); + ASSERT_EQ(memblock.reserved.max, INIT_MEMBLOCK_REGIONS * 2); + + dummy_physical_memory_cleanup(); + + /* + * The current reserved.regions is occupying a range of memory that + * allocated from dummy_physical_memory_init(). After free the memory, + * we must not use it. So restore the origin memory region to make sure + * the tests can run as normal and not affected by the double array. + */ + memblock.reserved.regions = orig_region; + memblock.reserved.cnt = INIT_MEMBLOCK_REGIONS; + + test_pass_pop(); + + return 0; +} + static int memblock_reserve_checks(void) { prefix_reset(); @@ -698,6 +784,7 @@ static int memblock_reserve_checks(void) memblock_reserve_overlap_bottom_check(); memblock_reserve_within_check(); memblock_reserve_twice_check(); + memblock_reserve_many_check(); prefix_pop();